Chair having revolvable vertically adjustable seat



April 3, 1956 B. F. HAMILTON 2,740,464

CHAIR HAVING REVOLVABLE VERTICALLY ADJUSTABLE SEAT Original Filed July24, 1950 2 Sheets-Sheet l JNVENTOR. jaw/a EHHM/Lrmv,

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April 3, 1956 B. F. HAMILTON 2,740,464

CHAIR HAVING REVOLVABLE VERTICALLY ADJUSTABLE SEAT Original Filed July24, 1950 2 Sheets-Sheet 2 CHAIR HAVING REVOLVABLEVERTICALLY ADJUSTABLESE-A'P Bertis 1 Hamilton, Columbus, Ind.'; William S. Hamilton,

executor of said Bertis F; Hamilton, deceased,iassignor i to HamiltonManufacturing Corporation, Columbus, Ind., a corporation of- IndianaOriginal application July 24, 1950,- Serial No ;.1@75-, 6 03. Dividedand this application October 29, 1951, Serial No. 257,625

Claims. (Cl. 155-94) with sheet-metal and metal tubing, which can besimply and economically manufactured, which will prove sturdy anddurable in use, and which will possess a pleasing appearance' Anotherobject of the invention is to provide an improved means for adjusting achair-back horizontally with reference to the chair-seat.

In carrying out the invention in the preferred form, I provide for thechair a base having an upwardly projecting seat-supporting rod, the rodbeing adjustable with respect to the base to provide for adjustment ofseatheight. The chair-seat includes a cross-member having a pair ofsheet-metal bearing supports in which is mounted a sleeve bearingrotatably receiving the upper end of the seat-supporting rod. Achair-back includes a back-support having two general horizontal,parallel arms which are slidably received in the aforesaid cross member,and means are provided for releasably holding such arms in any desiredposition of adjustment.

The accompanying drawings illustrate the invention: Fig. l is a frontelevation of a chair in which the invention is embodied; Fig. 2 is afragmental side elevation of the chair, in partial section on the lineZ2 of Fig. 3; and Fig. 3 is a horizontal section on the line 33 of Fig.2.

The chair illustrated in the drawing comprises a base 11 which slidablyreceives a vertical seat-supporting rod 19. A rod-height adjusting lock40 maintains rod 19 at any selected position of vertical adjustment, toprovide for height adjustment of a chair-seat supported on the rod 19.The structure of the base and rod-lock forms no part of the invention ofthe present application, for it constitutes features of the parentapplication Serial No. 175,603, filed July 24, 1950, from whichapplication this application was required to be divided.

The chair-seat (see Fig. 2) desirably comprises a frame in the form of asheet-metal stamping shaped to provide a generally horizontal floor 21and an integral, downwardly extending, peripheral flange 22. Padding 23for the seat is supported on the floor 21 and covered by a covering 24of fabric or the like which extends downwardly over the flange 22 andaround the lower edge thereof.

The frame 21-22 is supported on a cross member 25, which desirably is abox-like sheet-metal stamping having outturned flanges 26 at the upperedges of its front and rear walls. The floor 21 rests on top of thecross member 25 and may be secured thereto through the medium of tongues27 struck downwardly from the floor and embracing the outer edges of theflanges 26.

To the upper and lower sides of the bottom of the States Patent2,740,464 Patented Apr. 3, 1956 cured to the rod ,19, as;.by; apin or;ri vet=.35 andiengagjeable .With theflangedlowerzend ofithesleeve'bea-ring 33".. A pin 36 extending through the upper end of therod 19 above the upper end of the sleeve bearing 33 prevents removal ofthe seat from the rod.

The chair shown in the drawings comprises a back support 50 to which aback 51 of any desired type is secured in any convenient manner. Thesupport 50 is desirably a length of metal tubing bent into a generalinverted U-shape and having its lower end portions 52 bent to extendforwardly in parallel relation. The horizontal portions 52 of the backsupport 50 extend through appropriately positioned holes in the rearside of the flange 22 and also through pairs of aligned holes in thefront and rear walls of the cross member 25. The horizontally extendingportions 52 are slidable in the holes which receive them, thuspermitting the back 51 to be adjusted forwardly and rearwardly of theseat. To hold the back support in any desired position of fore and aftadjustment, I may employ set screws 53 which extend through the bottomof the cross member 25 into clamping engagement with the back-supportportions 52.

In assembling the chair described, the two bearing supports 30 aresecured to the cross member 25, the sleeve bearing 33 is put in place,the rod 19 with the collar 34 secured to it is inserted into the sleevebearing from below, and the pin 36 is put in place to prevent withdrawalof the rod. The stamping 2l-22 with the tongues 27 bent downwardly toclear the flanges 26, is positioned on the cross member, and the tongues27 are then bent into the positions shown in Fig. 2 to embrace the edgesof the flanges 26 and secure the seat and crossmember 25 together. Theupholstery may be applied to the seat either before or after itsassembly with the cross member 25.

The back and back support may be mounted on the seat either before orafter the seat is applied to the base. In mounting the back support onthe seat, the horizontal portions 52 of the support are passed forwardlythrough the holes in the rear side of the seat-flange 22 and through thealigned openings in the front and rear walls of the cross member 25. Atransverse pin 58 may be provided in each of the horizontal portions 52of the back support to prevent inadvertent withdrawal thereof from thecross member.

I claim as my invention:

1. In a chair of the type described, a base, a seat-supporting rodextending upwardly from said base, a seat provided with a sheet-metalcross-member having a lower wall of. substantial horizontal extent, apair of dished bearing supports having peripheral portions secured tothe upper and lowerfaces of said lower wall and intermediate portionsspaced vertically above and below said wall, and a sleeve bearingextending between and secured to said intermediate portions, said sleevebearing receiving and being rotatable on the upper end of said rod.

2. In a swivel chair, a base, a seat-supporting rod extending upwardlyfrom said base, a seat provided with a sheet-metal cross-member having atransversely-extending lower wall, a pair of bearing plates secured tosaid lower cross-member Wall and having intermediate por- ,tions spacedvertically above and below said lower wall, said bearing plates beingprovided with aligned bearing openings for reception of said rodtherethrough, said cross-member also having upstanding front andrear'walls for supporting said seat above the upper of said plates.

3. The invention set forth in claim 2 with the addition of a sleeve-likeplate-supporting bearing extending be tween said intermediateplate-portions, said sleeve bearing receiving and being rotatable on theupper end of said rod.

4. The invention set forth in claim 2 with the addition of abutmentmeans carried by said rod and acting through one of said plates forholding said seat in desired elevation with respect to said rod.

5. The invention set forth in claim 2 with the addi- 4, tion that saidfront and rear walls are provided with two pairs of aligned openings,and a back support having {parallel horizontal portions slidablyreceived in said openings.

References Cited in the file of this patent UNITED STATES PATENTS657,875 Johnson Sept. 11, 1900 1,578,784 Walton Mar. 30, 1926 1,584,826Uhl May 18,1926 1,997,486 Hallowell Apr. 9, 1935 2,454,057 Grunwald Nov.16, 1948 2,529,780 Miller Nov. 14, 1950

